Related Experiment Video
Updated: Aug 15, 2026

Non-Invasive Model of Neuropathogenic Escherichia coli Infection in the Neonatal Rat
Published on: October 29, 2014
Experimental infectious pancreatic necrosis infections: propagative or point-source epidemic?
G Smith1, J Bebak, P E McAllister
1Section of Epidemiology and Public Health, University of Pennsylvania School of Veterinary Medicine, New Bolton Center, 382 West Street Road, Kennett Square, PA 19348, USA.
Abstract:
Experimentally initiated epidemics of infectious pancreatic necrosis in rainbow-trout fry were analyzed using a modification of the standard mathematical model for a simple propagative epidemic. Contrary to expectations, the value of the transmission parameter (beta) was inversely related to initial density of susceptible hosts. This anomaly can be explained if we assume that the experimental epidemics were point-source rather than propagative epidemics. The implications of this conclusion for modeling experimental and natural epidemics are discussed.
Related Concept Videos
Reservoir of Infection
Investigation of Disease Outbreaks
Inhalation Anthrax
Plague
Bacterial Gastroenteritis
Poliomyelitis

